2003A&A...400..891M


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.14CEST14:24:15

2003A&A...400..891M - Astronomy and Astrophysics, volume 400, 891-902 (2003/3-4)

Brown dwarfs in the Pleiades cluster: Clues to the substellar mass function.

MORAUX E., BOUVIER J., STAUFFER J.R. and CUILLANDRE J.-C.

Abstract (from CDS):

We present the results of a 6.4 square degrees imaging survey of the Pleiades cluster in the I and Z-bands. The survey extends up to 3 degrees from the cluster center and is 90% complete down to I≃22. It covers a mass range from 0.03M to 0.48M and yields 40 brown dwarf candidates (BDCs) of which 29 are new. The spatial distribution of BDCs is fitted by a King profile in order to estimate the cluster substellar core radius. The Pleiades mass function is then derived accross the stellar-substellar boundary and we find that, between 0.03M and 0.48M, it is well represented by a single power-law, dN/dM∝M–α, with an index α=0.60±0.11. Over a larger mass domain, however, from 0.03M to 10M, the mass function is better fitted by a log-normal function. We estimate that brown dwarfs represent about 25% of the cluster population which nevertheless makes up less than 1.5% of the cluster mass. The early dynamical evolution of the cluster appears to have had little effect on its present mass distribution at an age of 120Myr. Comparison between the Pleiades mass function and the Galactic field mass function suggests that apparent differences may be mostly due to unresolved binary systems.

Abstract Copyright:

Journal keyword(s): stars: low-mass, brown dwarfs - stars: luminosity function, mass function - open clusters and associations: individual: Pleiades

VizieR on-line data: <Available at CDS (J/A+A/400/891): table3.dat>

Nomenclature: Table 3: Cl* Melotte 22 MBSC NNN (Nos 1-109). Table 4: Cl* Melotte 22 PLIZ NN (Nos 1-40).

CDS comments: Table 3, paper: Numbering 111 and 112 are misprints, the table contains objects from 1 to 109.

Simbad objects: 153

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Number of rows : 153

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 2MASS J03392241+2611362 PM* 03 39 22.4067517761 +26 11 36.345982543     18.20   14.90 ~ 8 0
2 Cl* Melotte 22 MBSC 82 * 03 39 44.3565463860 +26 18 19.042619028           ~ 2 0
3 2MASS J03394701+2621146 PM* 03 39 47.0118221463 +26 21 14.602941900     18.20   15.20 ~ 6 0
4 Cl* Melotte 22 MBSC 94 * 03 39 57.1386175607 +26 07 00.337836874           ~ 4 0
5 2MASS J03395784+2555299 PM* 03 39 57.8414095081 +25 55 29.895887748         15.72 ~ 6 0
6 Cl* Melotte 22 MBSC 63 * 03 41 29.3771596848 +24 53 40.233709427           ~ 1 0
7 2MASS J03413983+2452303 PM* 03 41 39.8318203684 +24 52 30.261672546     19.70   15.90 ~ 9 0
8 Cl* Melotte 22 PLIZ 4 LM* 03 41 40.8985862654 +25 54 24.267269131           ~ 5 0
9 V* KQ Tau Er* 03 41 58.8529405487 +26 12 21.420648291   18.54 17.02   14.32 ~ 15 0
10 Cl* Melotte 22 BPL 31 * 03 41 59.6580252659 +24 42 18.438534345         16.62 ~ 6 0
11 2MASS J03420329+2432134 PM* 03 42 03.2983543974 +24 32 13.476597399   17.933 16.396   13.923 ~ 22 0
12 V* V611 Tau Er* 03 42 31.2034778750 +24 49 21.664551885   20.5 19.10   15.80 ~ 16 0
13 Cl* Melotte 22 PLIZ 8 LM* 03 43 00.1687468237 +24 43 52.684889659         18.80 M7.9 18 0
14 V* LU Tau Er* 03 43 09.7405237323 +24 41 33.111794593 20.523 17.97 16.37   13.73 ~ 35 0
15 V* V620 Tau Er* 03 43 20.5652850249 +24 26 35.225332953         15.67 ~ 20 0
16 Cl* Melotte 22 DH 267 ** 03 43 26.9595513774 +24 27 10.071681804   18.158 16.581   13.850 M3.5 25 0
17 Cl* Melotte 22 DH 269 PM* 03 43 29.8886783779 +24 39 23.796702596 23.537   20.0     ~ 13 0
18 V* V622 Tau Er* 03 43 34.1352426101 +25 35 26.156373858   18.61       ~ 16 0
19 2MASS J03433666+2547007 PM* 03 43 36.6631884364 +25 47 00.824978475     16.83     ~ 8 0
20 Cl* Melotte 22 PLIZ 16 LM* 03 43 40.28880 +24 30 11.3976         19.50 M8.3 20 0
21 2MASS J03434288+2551372 PM* 03 43 42.8861777010 +25 51 37.238510839     19.4     ~ 5 0
22 Cl* Melotte 22 DH 283 * 03 43 43.1378595647 +24 32 56.350646919 22.956         ~ 12 0
23 2MASS J03434371+2429157 PM* 03 43 43.7050463613 +24 29 15.857432632   17.807 16.217   13.803 ~ 22 0
24 2MASS J03434407+2539497 PM* 03 43 44.0751912791 +25 39 49.794772725           ~ 4 0
25 2MASS J03435277+2529304 PM* 03 43 52.7830780308 +25 29 30.584280649     17.0     ~ 9 0
26 Cl* Melotte 22 DH 316 PM* 03 44 10.7527475199 +25 37 38.471978698     17.98   14.97 ~ 9 0
27 Cl* Melotte 22 PLIZ 11 LM* 03 44 12.6901742145 +25 24 35.054450585           ~ 6 0
28 V* V515 Tau Er* 03 44 13.96488 +25 32 15.5436   18.754 17.146   14.070 ~ 18 0
29 2MASS J03442507+2534040 PM* 03 44 25.0766854898 +25 34 04.148350861     19.12 18.1 15.67 ~ 8 0
30 2MASS J03443215+2508125 PM* 03 44 32.1641712808 +25 08 12.509252679     19.30   15.90 ~ 8 0
31 V* V742 Tau Er* 03 44 33.0679352241 +25 45 09.785228019           ~ 11 0
32 IC 348 OpC 03 44 34 +32 09.8           ~ 1231 1
33 Cl* Melotte 22 PLIZ 9 LM* 03 44 35.1622523997 +25 13 43.010292295         18.66 M9.3 13 0
34 Cl* Melotte 22 PLIZ 26 LM* 03 44 48.66537 +25 39 17.5825           ~ 2 0
35 2MASS J03450120+2521058 PM* 03 45 01.2068364259 +25 21 05.877138513         15.70 ~ 7 0
36 Cl* Melotte 22 DH 368 PM* 03 45 02.8793098594 +25 05 19.879392506     18.54   15.37 M4.5 15 0
37 Cl* Melotte 22 DH 371 PM* 03 45 04.2027455103 +26 40 44.911351631         15.10 ~ 6 0
38 Cl* Melotte 22 DH 377 * 03 45 09.0304891143 +25 32 49.260126790     18.20   15.20 ~ 8 0
39 Cl* Melotte 22 DH 404 * 03 45 51.9476985129 +25 10 01.887857323     18.70   15.20 ~ 10 0
40 Cl* Melotte 22 PLIZ 38 LM* 03 45 54.71419 +26 30 14.8610           ~ 1 0
41 Cl* Melotte 22 DH 411 * 03 45 57.2776602999 +25 11 12.906235072     16.5   13.75 ~ 16 0
42 Cl* Melotte 22 MBSC 14 * 03 45 57.8186833090 +26 18 44.090319177           ~ 1 0
43 Cl* Melotte 22 DH 413 * 03 45 58.8005913424 +26 20 01.992988398     20.40   15.90 ~ 7 0
44 Cl* Melotte 22 HHJ 194 * 03 46 06.4501363570 +25 25 11.672891735     17.60   15.10 ~ 3 0
45 Cl* Melotte 22 DH 437 * 03 46 19.8806140799 +24 59 00.744790084     17.40   14.40 ~ 19 0
46 Cl* Melotte 22 DH 444 PM* 03 46 23.7268856995 +26 34 23.337300167     18.60   15.20 ~ 8 0
47 V* V532 Tau Er* 03 46 45.7695757202 +25 27 30.442866535   18.43 16.87   14.21 M3.5 24 0
48 2MASS J03464718+2520534 PM* 03 46 47.1810463010 +25 20 53.347875291     18.70   15.00 ~ 8 0
49 V* V860 Tau Er* 03 46 54.0266603869 +25 14 45.028306692   17.84 16.19   13.76 ~ 30 0
50 Cl* Melotte 22 HHJ 31 * 03 46 55.3506408206 +25 51 29.554673682         16.40 ~ 4 0
51 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 2992 0
52 Cl* Melotte 22 SK 432 ** 03 47 15.285672 +25 06 55.48032   18.361 16.701 16.11 13.976 ~ 22 0
53 Cl* Melotte 22 DH 507 * 03 47 21.8381418930 +25 53 52.583323995   16.793 15.209   13.109 M1.2 13 0
54 2MASS J03472192+2622476 PM* 03 47 21.9298120213 +26 22 47.556053354     18.20   14.90 ~ 7 0
55 Cl* Melotte 22 PLIZ 24 LM* 03 47 23.70720 +26 00 59.9421           ~ 1 0
56 V* V539 Tau Er* 03 47 25.7892436764 +25 08 33.065883756   18.68 16.91   13.98 M4 34 0
57 Cl* Melotte 22 MBSC 49 * 03 47 25.8893633713 +25 26 26.761793920           ~ 5 0
58 2MASS J03472840+2632058 PM* 03 47 28.3989329739 +26 32 05.893495781         15.15 ~ 8 0
59 V* V456 Tau Er* 03 47 30.5788084003 +26 16 44.837073278     17.00   14.40 ~ 13 0
60 Cl* Melotte 22 MBSC 104 * 03 47 31.3584617669 +25 25 11.180438923           ~ 1 0
61 V* V751 Tau Er* 03 47 37.3450594036 +25 20 02.583098702           ~ 11 0
62 Cl* Melotte 22 DH 534 * 03 47 43.8800197999 +26 13 27.161720841         15.76 ~ 7 0
63 Cl* Melotte 22 DH 537 * 03 47 47.8765760227 +25 13 33.850772365     18.03   14.70 ~ 17 0
64 Cl* Melotte 22 PLIZ 7 LM* 03 48 12.1226877919 +25 54 28.347634884           ~ 2 0
65 Cl* Melotte 22 DH 563 * 03 48 15.4757210148 +25 14 36.605992767         15.61 ~ 14 0
66 Cl* Melotte 22 BPL 183 * 03 48 36.3298896989 +25 15 41.376620345         16.59 ~ 7 0
67 Cl* Melotte 22 DH 589 * 03 48 44.0423348197 +25 06 22.617516902         15.16 ~ 16 0
68 Cl* Melotte 22 BPL 192 * 03 48 50.4389915125 +25 17 54.840197175         17.16 ~ 7 0
69 2MASS J03490883+2553488 PM* 03 49 08.8299955609 +25 53 48.918052477   17.661 16.115   13.673 M2.5 16 0
70 V* V798 Tau Er* 03 49 20.2979808754 +25 25 42.585264989     17.40   14.80 ~ 12 0
71 Cl* Melotte 22 DH 618 * 03 49 22.1368052371 +25 47 37.975452953     18.00   15.10 ~ 7 0
72 Cl* Melotte 22 MBSC 95 * 03 49 28.7950843466 +26 50 51.656937833           ~ 3 0
73 2MASS J03493279+2547471 PM* 03 49 32.8020990356 +25 47 47.107621668     18.30   15.00 ~ 9 0
74 Cl* Melotte 22 MBSC 29 * 03 49 38.2334292717 +26 51 05.893246903         14.92 ~ 6 0
75 Cl* Melotte 22 PLIZ 29 LM* 03 49 45.24310 +26 50 50.3368           ~ 2 0
76 Cl* Melotte 22 MBSC 98 * 03 49 48.1513475928 +26 37 47.830622532           ~ 4 0
77 Cl* Melotte 22 PLIZ 40 LM* 03 49 49.24710 +26 33 56.3445           ~ 1 0
78 Cl* Melotte 22 PLIZ 32 LM* 03 50 15.43516 +26 34 51.5165           ~ 1 0
79 Cl* Melotte 22 BPL 229 * 03 50 29.2934919292 +24 56 34.767840779         15.33 ~ 4 0
80 Cl* Melotte 22 DH 681 * 03 50 40.8218775155 +24 40 02.811239318         15.87 ~ 6 0
81 Cl* Melotte 22 MBSC 73 * 03 50 42.4302046739 +24 12 55.597808609         15.45 ~ 7 0
82 Cl* Melotte 22 PLIZ 33 LM* 03 50 44.68 +26 42 09.4           ~ 1 0
83 2MASS J03505464+2421560 PM* 03 50 54.6462080824 +24 21 55.932223421         15.14 ~ 6 0
84 Cl* Melotte 22 MBSC 69 * 03 50 54.9799041046 +24 33 03.726981170           ~ 5 0
85 V* V800 Tau Er* 03 50 57.4110449814 +24 06 30.835001166   18.153 16.572   14.081 ~ 17 0
86 Cl* Melotte 22 DH 692 * 03 51 05.0797209906 +26 36 51.488472624         16.39 ~ 5 0
87 Cl* Melotte 22 PLIZ 1 LM* 03 51 05.9610075342 +24 36 17.065766992           ~ 2 0
88 V* V379 Tau Er* 03 51 11.5286629752 +24 23 13.173056758   17.737 16.195   13.641 ~ 24 0
89 Cl* Melotte 22 BPL 232 * 03 51 11.8784127955 +23 44 43.486650760         15.87 ~ 13 0
90 V* V466 Tau Er* 03 51 19.0612965439 +24 10 13.223387543   17.698 16.132   13.648 ~ 23 0
91 Cl* Melotte 22 PLIZ 12 LM* 03 51 25.5664173006 +23 45 21.481457318         19.00 M8.0 63 0
92 Cl* Melotte 22 PLIZ 17 LM* 03 51 26.6579804542 +23 30 10.191065396           ~ 2 0
93 Cl* Melotte 22 PLIZ 23 LM* 03 51 33.46284 +24 10 14.2474           ~ 2 0
94 2MASS J03513401+2434090 PM* 03 51 33.9933273972 +24 34 09.120779030         14.83 ~ 8 0
95 Cl* Melotte 22 DH 716 * 03 51 34.2513395211 +23 47 50.042119781         15.50 ~ 7 0
96 V* V383 Tau Er* 03 51 39.1051447995 +24 35 29.260634829   18.6     14.96 ~ 12 0
97 Cl* Melotte 22 DH 723 * 03 51 42.3088508929 +24 21 41.437955543         15.15 ~ 7 0
98 Cl* Melotte 22 PLIZ 10 LM* 03 51 44.9386634372 +23 26 39.572829605         18.45 ~ 11 0
99 Cl* Melotte 22 PLIZ 30 LM* 03 51 45.95440 +26 49 38.3853           ~ 1 0
100 Cl* Melotte 22 PLIZ 31 LM* 03 51 47.660 +24 39 58.90         20.944 ~ 6 0
101 Cl* Melotte 22 BRB 1 LM* 03 51 51.5442334820 +23 34 49.372667345         16.10 M4.9 20 0
102 Cl* Melotte 22 PLIZ 22 LM* 03 51 52.61942 +26 52 31.8549           ~ 1 0
103 V* V475 Tau Er* 03 51 53.91984 +24 02 51.7452   18.68 16.92   13.96 ~ 19 0
104 V* V389 Tau Er* 03 51 54.5325521917 +23 33 30.860027562   18.901 17.268   14.357 ~ 23 0
105 V* V387 Tau Er* 03 51 59.3146946441 +24 39 58.956332789           ~ 14 0
106 Cl* Melotte 22 BRB 8 LM* 03 52 05.8181104116 +24 17 31.210660893       19.32 17.34 M5.6 14 0
107 Cl* Melotte 22 PLIZ 3 LM* 03 52 06.7057393991 +24 16 00.698620526         18.02 M6.0 25 0
108 Cl* Melotte 22 DH 748 * 03 52 17.5407280849 +24 27 19.906470951         15.03 ~ 14 0
109 Cl* Melotte 22 PLIZ 15 LM* 03 52 18.6543847514 +24 04 27.578599789           ~ 11 0
110 V* V476 Tau Er* 03 52 30.9126113958 +24 32 39.756834424   18.378 16.858   13.978 M4 21 0
111 V* V768 Tau Er* 03 52 38.9038070934 +25 50 25.611192621     17.80   14.80 ~ 21 0
112 Cl* Melotte 22 PLIZ 35 BD* 03 52 39.14137 +24 46 29.7814         21.293 L2.0 7 0
113 Cl* Melotte 22 PLIZ 25 LM* 03 52 44.30 +24 24 50.0           ~ 4 0
114 Cl* Melotte 22 DH 766 * 03 52 44.4754455275 +24 20 59.573496182         15.72 ~ 14 0
115 Cl* Melotte 22 BPL 270 * 03 52 46.4447102347 +24 33 41.192050931         15.20 ~ 4 0
116 Cl* Melotte 22 BRB 5 LM* 03 52 51.7869209625 +23 33 48.284437963       18.600 16.60 ~ 15 0
117 Cl* Melotte 22 DH 778 PM* 03 53 07.2795931708 +25 47 21.707475891     20.40   16.10 ~ 13 0
118 Cl* Melotte 22 BRB 6 LM* 03 53 09.6299803561 +23 33 47.970355679       18.77 16.50 ~ 12 0
119 Cl* Melotte 22 MBSC 106 * 03 53 12.5132586594 +25 48 17.135385853           ~ 1 0
120 Cl* Melotte 22 DH 784 * 03 53 24.1102084342 +23 47 58.561609648     18.10   15.20 ~ 11 0
121 Cl* Melotte 22 PLIZ 14 LM* 03 53 32.1889751363 +26 06 55.945995230           ~ 2 0
122 Cl* Melotte 22 DH 790 * 03 53 35.5122358664 +26 07 08.401918383     19.00   15.60 ~ 7 0
123 Cl* Melotte 22 PLIZ 5 LM* 03 53 37.7514277502 +26 02 21.392367635           ~ 1 0
124 Cl* Melotte 22 PLIZ 39 LM* 03 53 40.28279 +26 16 19.7123           ~ 1 0
125 V* V570 Tau Er* 03 53 47.5712025523 +23 44 31.040398125     17.64   14.65 ~ 21 0
126 Cl* Melotte 22 PLIZ 6 LM* 03 53 55.1152628020 +23 23 36.302170350         17.752 M8.0 22 0
127 Cl* Melotte 22 BPL 297 PM* 03 54 00.3749423510 +24 34 50.086935597         16.69 ~ 10 0
128 Cl* Melotte 22 PLIZ 18 LM* 03 54 00.96 +24 54 52.9           ~ 1 0
129 Cl* Melotte 22 PLIZ 34 LM* 03 54 02.55163 +24 40 26.0929           ~ 1 0
130 Cl* Melotte 22 BPL 301 * 03 54 02.7174281439 +23 35 01.236104260         15.52 ~ 8 0
131 Cl* Melotte 22 PLIZ 20 LM* 03 54 05.32560 +23 33 59.7708         19.571 M9.0 15 0
132 V* V400 Tau Er* 03 54 13.0060734035 +23 20 50.919917796   18.286 16.689   14.107 ~ 17 0
133 Cl* Melotte 22 PLIZ 28 BD* 03 54 14.05703 +23 17 52.2063         20.760 L0.0 8 0
134 Cl* Melotte 22 BPL 308 * 03 54 15.6030517969 +24 20 45.879122556         16.51 ~ 11 0
135 Cl* Melotte 22 DH 801 * 03 54 22.4745743300 +23 38 12.182596593     18.00   15.00 ~ 17 0
136 V* V401 Tau Er* 03 54 25.0562422399 +24 42 43.073471300   20.4     15.49 ~ 21 0
137 Cl* Melotte 22 PLIZ 36 LM* 03 54 38.35989 +23 38 00.9290           ~ 1 0
138 Cl* Melotte 22 DH 806 * 03 54 39.1273501585 +24 35 54.724509474         16.33 ~ 13 0
139 Cl* Melotte 22 PLIZ 27 LM* 03 55 00.36843 +23 38 08.9319           ~ 1 0
140 Cl* Melotte 22 PLIZ 13 LM* 03 55 04.3559468236 +26 15 50.470009080           ~ 3 0
141 Cl* Melotte 22 SK 67 PM* 03 55 07.0686252498 +24 17 25.963913815     16.09     ~ 4 0
142 Cl* Melotte 22 DH 812 * 03 55 08.9680216321 +24 05 02.771117321     17.10   14.00 ~ 17 0
143 Cl* Melotte 22 MBSC 107 * 03 55 10.5603695916 +23 40 30.913840134           ~ 1 0
144 Cl* Melotte 22 PLIZ 2 LM* 03 55 23.0748119806 +24 49 05.220045063         17.719 M7.1 18 0
145 Cl* Melotte 22 PLIZ 21 LM* 03 55 27.61660 +25 49 41.0330           ~ 3 0
146 Cl* Melotte 22 DH 815 * 03 55 30.8949037938 +23 23 51.093137091     17.21   14.44 ~ 11 0
147 Cl* Melotte 22 DH 818 * 03 55 34.4048966558 +23 58 28.593765724     19.60   15.80 ~ 15 0
148 Cl* Melotte 22 PLIZ 37 LM* 03 55 39.57 +24 20 42.1           ~ 1 0
149 Cl* Melotte 22 PLIZ 19 LM* 03 56 16.3824260623 +23 54 50.891927062           ~ 3 0
150 Cl* Melotte 22 DH 837 PM* 03 56 28.8956391515 +24 01 54.353201888     17.90   15.20 ~ 12 0
151 Cl* Melotte 22 DH 846 * 03 56 52.9044782472 +23 25 44.123497033     17.60   14.60 ~ 6 0
152 NAME sigma Orionis Cluster MGr 05 38 42 -02 36.0           ~ 487 0
153 NGC 2168 OpC 06 08 54 +24 20.0           ~ 459 0

    Equat.    Gal    SGal    Ecl

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2020.08.14-14:24:15

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